Pagina 13 - Ti_News_january2013_9

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Ta g h l e e f I n d u s t r i e s N e w s
Comparative tests confirm:
provide excellent barrier against mineral oils
A recent study conducted by the
European Food Safety Authority (EFSA
) reports that
exposure to Mineral oil hydrocarbons
(MOH) via packaging and some foods may
pose a human health hazard, and suggests
to implement measures to assess and
monitor the risk from these substances.
For the moment being this statement
has not led to dedicated regulation by
the European Commission, although the
risk assessment body confirmed that
recycled paperboard in food packaging
- particularly without barrier liners - is
likely to be a major source of exposure to
MOHs and highlighted that some breads
and grains contain the highest levels of
the mixtures. MOH include a wide group
of blends of hydrocarbons containing
thousands of chemical compounds, all
with different structures and sizes.
The two main categories assessed as
part of the study were ‘aromatic’ and
‘saturated’ MOHs. Each presents different
potential problems; aromatic mixtures
may be carcinogenic while saturated
forms of the chemical can accumulate in
the body and cause liver damage.
Recent concerns came after Swiss
scientists found that MOHs from inks
contained in recycled paperboard were
leaching into foods.
Other sources are printing inks and
additives used in the manufacture of
plastics, such as lubricants and adhesives.
Food additives and processing aids also
contribute to levels of saturated mineral
oils (MOSHs), along with release agents
for bakery products, sugar products and
oils for surface treatment of rice and
confectionery. When contamination
comes from MOHs migrating from
packaging to the food, there are two
available remedies:
- Remove the source of MOHs (i.e. replace
recycled paper and board with virgin)
- Include functional barriers to the
packaging, to prevent migration of MOHs
into food
In order to have a clear picture of
the situation, Taghleef Industries has
commissioned a comparative test to the
Fraunhofer Research Institute, comparing
the barrier performance of various
packaging films against 15 different
mineral oil substances. As you can see
from the table below, standard clear
BOPP films show very high permeation
rates. Metalised BOPP shows an
improvement, with factor 2 to 3 lower
permeation rate for some of the
substances versus clear BOPP, but is still
far from being considered a “barrier”
film in this sense.
On the other hand, EXTENDO™ and
NATIVIA™ films have demonstrated
permeation rates close or below the
detection limit of the test unit, a
performance comparable to that of
BOPET film, which was also included
in the tests and which is commonly
considered as the best-in-class in terms
of barrier to MOHs.
If you require further information and
a full report of the test, please do not
hesitate to contact your Ti representative.
For those who are interested, the full
study conducted by EFSA can be found